D4 killing my internet

So, i’m new to d4 and bought it from steam when the new dlc dropped. I enjoyed the first 3-4 hours of it but then i suddenly began to get disconnected constantly after 10-15 minutes of playing. I can no longer progress in the game since it doesnt save anything i do.

There are no other games that are causing this besides from D4. It is like it’s crashing my ethernet connection for 5-10 seconds and then it comes back online. I have a stable connection with 600mb/s. I have also disabled crossplay since ive read that it has helped some people but it was no help for me as it kept happening.

Any suggestions on how to fix this cause i just wanna play the game without issues…